The ex-couple insisted when they announced their split in May that little would change at the sprawling philanthropy. Yet Wednesday brought a remarkable turn of events: Along with committing another $15 billion to the endowment and announcing a plan for new trustees, the pair also laid bare that they may not be able to work together in the future — raising the possibility French Gates will exit. “Gates and French Gates are fully committed to continuing to work constructively together at the foundation,” the organization said in a statement. “However, they have also agreed to an additional step to ensure the continuity of the foundation’s work: if after two years either decides they cannot continue to work together as co-chairs, French Gates will resign her position as co-chair and trustee.”